Lamp



8, 1933- H. M. GREIST r AL 1,921 815 LAMP Filed Feb. 9, 1931 PatentedAug. 8, 1933 UNITED STATES LAMP Hubert M. Greist and George .1. LaVigne, New Haven, Conn., assignors to Greist Manufacturing Company, NewHaven, Conn.

Application February 9, 1931. Serial No. 514,398

9 Claims. (Cl. 240-73) This invention relates to lamps, and moreparticularly to a portable lamp provided with a shade detachably securedto the lamp standard.

In devices of this class, and particularly in connection with portableelectric lamps, the

that, in case it becomes broken or cracked, it may be readily removedand replaced with a new one. One object of the present invention,therefore,

is the provision of new and improved means for securing a' glass shadeupon the metal lamp arm.

Another object of the invention is the provision of means for securing ashade of glass or .the like upon a lamp so that the shade may be readilydetached, but when secured in place will be rigidly held againstaccidental displacement.

A still further object of the invention is the provision of means forsecuring the glass shade upon a lamp which will be both eiiicient andeconomical to manufacture and by means of which the shade will be heldsecurely in place without excessive strain upon any of the parts andparticularly the glass shade which might result in the breakage thereof.

To these and other ends, the invention consists in the novel featuresand combinations of parts to be hereinafter described and claimed. i

In the accompanying drawing:

Fig. 1 is a side elevational view of a portable electric lamp embodyingour improvements;

Fig. 2 is a cross-sectional view ofthe shade and holding means therefortaken on line 2-2 of Fig. 3;

- Fig. 3 is an elevational view of the shade-hold- 'ing means from theinterior of the shade;

Fig. 4 is a sectional view on line 4-4 of Fig. 5 is a detail elevationalview of the supporting plate, and Fig. 6 is a detail elevational view ofthe clamping means secured to the shade.

To illustrate a preferred embodiment of our invention, we have shown alamp having a base 10, a standard 11 and an arm 12 pivoted to thestandard at 13 so that the shade may be adjusted at various anglesrelatively to the standard. At the end of the arm 12 is secured asupporting plate 14 shown more especially in Fig. 5, this plate beingsecured to the arm by the rivets 15 passing through the plate and is arearwardly extending flange 3i).

through the laterally turned ends 16 on the arm sections, and alsobymeans of tongues 1'? on the ends of the arm sections being passedthrough the openings in the plate and turned laterally to clamp theparts together. To the plate 14 is secured a hollow boss or sleeve member 18 having an external threaded portion 19 upon which is received aknurled nut 20. The sleeve 18 is, as shown, also provided with ashoulder portion 21 adjacent the plate.

As shown in Fig. 5, the plate 14 is substantially semi-circular orsegmental in shape and isprovided along its lower edge witha'horizontally extending base flange 22 to serve as a bottom rest orsupport for the shade, as will be hereinafter explained. At one end thisflange is provided with an integral arm extending therefrom to supportthe lamp socket. This arm comprises an upwardly extending portion 23, ahorizontal portion 24 which extends longitudinally of the shade, and ahorizontally and transversely extending portion 25 which extendsoutwardly in a direction away from the plate. The portion 25 of the armhas'an opening 25 formed therein and the metal of the arm about thisopening is displaced outwardly to provide a flange 26 surrounding theopening. It will be understood that the arm is of fiat sheet materialand the opening preferably will be provided therein by the striking outof themetal to provide the flange. This flange is inserted in an openingin the base of the socket 27 and crimpedor expanded outwardly over theedge of the opening andover a washer 2'7 disposed within the base of thesocket to secure the socket to the arm. This method of construction alsoprovides for the cord entering the socket through the opening 25 of thearm. n

r The shade 28, as shown in the drawing, is provided adjacent thecentral portion of its rear wall with a segmental opening 29 about whichA clamp member,- as will be presently described, is secured within thissegmental opening, and clamped upon the edge of the shade about thisopening. This clamp member is permanently secured to the shade and isemployed to secure the shade in place so that any pressure exerted bythe securing or clamping devices will be borne by this member and not bythe glass portion of the shade.

This clamp member comprises front and back portions 31 and 32 ofsegmental shape, the back portion 32 being provided with a flange 33 to.overlie the flange upon the shade, whilethe front portion 31 beingprovided with an extended end 34 bears against the inner face of theshade about the opening 29. The front and back portions of the clampmember are integrally joined at their bases by a horizontal portion 35so that, as will be obvious, the clamp member is substantially U-shapedin cross-section. These two members are secured together by means of therivets 36 so that they bind tightly upon the edge of the shade about thearcuate opening 29.

A spring 37 is provided between the front and back portions of the clampmember and has its ends secured about the rivets 36. This spring is, asshown in Fig. 5, provided with an intermediate loop or bight portion 38below which is a contracted portion 39. The loop portion of the springis provided at the central portion thereof and lies within openings 40provided within the front and rear clamp portions 31 and 32. A detailportion of the shade with. the clamp member thereon is shown in Fig. 6,and it will be apparent that the openings 40 constitute recesses ornotches cut through the lower base portion 35 of the clamp member sothat this member may be passed downwardly over the hollow threadedsleeve 18, the width of the openings 40 being slightly larger than thediameter of the shoulder portion 21 of this sleeve. The contractedportion 39 of the spring will preferably be slightly smaller than thehollow sleeve 18 so that it will be necessary to distort or open thespring slightly to force the shade downwardly upon the sleeve, whichlatter will, when the bight portion 38 of the spring is seated thereon,be gripped by the spring so that the shade will be resiliently held inplace.

When the parts are assembled, the shade with the clamping member thereonwill be moved downwardly between the socket-supporting member 24 and theplate 14 until the hollow sleeve 18 passes within the contracted portionof the spring, and the base 35 of the clamp member rests upon thesupporting flange 22 of the plate 14. It will be. apparent that thisflange will support the shade from below and this, together with thebinding action of the portion 38 of the spring, will prevent anytendency of the shade to tilt or to become accidentally displaced whenthe nut 20 is screwed upon the threads 19.

It will be observed that this nut is provided shoulder 43 which abutsthe front plate so as to bind the clamp member tightly against the plate14. The cord 4% may be passed through the arm.12, through the hollowsleeve 18, and through an opening 45 in the arm 25 to enter the base ofthe socket 27.

It will be apparent that. the shade will be tightly clamped in position,and that any strain upon the parts will be borne bythe clamp portions 31and 32 and at the same time by unscrewing the nut 20, the shade may bereadilyremoved if it is necessary to replace it. It will also beapparent that the shade is secured against any likelihood of its being.accidentally displaced or tilted While in use.

While we have shown and described a preferred embodiment of ourinvention, it will be understood that it is not to be limited to all ofthe details shown, but is capable of modification and variation withinthe spirit of the invention and within the scope of the appended claims.

What we claim is:

l. A lamp having a shade-supporting arm, said arm being provided with aplate and a post projecting from the plate, a shade suported by the arm,means secured to said shade having spring arms to embrace and engage thepost, and means to clamp the shade against the plate.

2. A lamp having a shade-supporting arm, said arm being provided with aplate and a post projecting from the plate, a shade supported by thearm, means secured to said shade having spring arms to embrace andengage the post, means to clamp the shade against the plate, and saidplate being provided with a horizontally extending'fiange to support theshade from below.

3. A lamp having a shade-supporting arm, said arm being provided with aplate and a post projecting from the plate, a shade supported by thearm, said shade being provided with means having spring arms to embraceand engage the post, means to clamp the shade against the plate, saidplate being provided with a horizontally extending flange to support theshade from below, and said shade being provided with an opening throughwhich said post projects.

'4. A lamp having a shade-supporting arm, said arm carrying a platehaving a horizontally extending flange thereon, a shade having its loweredge resting on said flange, said shade being provided with an openingthrough its lower edge, a clamp member secured to the shade within saidopening, means to bind said clamp member against said plate to securethe shade on the arm, said plate being provided with a post received inthe opening in the'clamp member, and resilient means within the openingto embrace the post and secure the shade thereon.

5. A lamp having a pivoted shade-holding arm, said arm being providedwith a plate and a post projecting from said plate, a shade supported bythe arm, said shade being provided with an opening through its loweredge, a clamp member of resilient material permanently secured to theshade within said opening, and said clamp member being provided with anopening to receive the post, and means upon the post to bind said clampmember against the plate to secure the shade upon thearm.

6. A lamp having a pivoted shade-holding arm, said arm being providedwith a plate and a post projecting from said plate, a shade supported bythe arm, said shade. being provided with an opening through its loweredge, a clamp member of resilient material secured to the shade withinsaid opening, and said clamp member being provided with an opening toreceive the post, means upon the post to bind said clamp member againstthe plate to secure the shade upon the arm, said clamp member com-'prising a piece of resilient material doubled upon itself to embrace theedges of the opening in the shade, and spring means between the sides ofsaid member to yieldingly engage the post.

7. A lamp having a pivoted shade-supporting arm, a plate carried by saidarm having a horizontally extending flange thereon, a shade hav-;

ing its lower edge portion resting on said flange, a clamp membersecuredto the shade and provided with an opening therein, a post projectingfrom the plate through said opening, a nut threaded on said post to bindthe clamp member against the plate, and resilient means carsaid armbeing provided with a plate and'a post projecting from the plate, ashade supported by the arm, said shade having an opening extendingthrough its bottom edge whereby it may be positioned over the armlaterally thereof, and resilient means secured to the shade Within saidopening to grip the said post, said resilient means being adapted tospring apart to receive the post therebetween, and means to clamp theshade upon the post.

HUBERT M. GREIST. GEORGE J. LA VIGNE.

